We have very little evidence for cannibalism among the pre-Columbian Mesoamericans. What evidence we do have is primarily from Spanish sources, conveniently after the Spanish Crown decreed that cannibalism tribes were not Spanish subjects and exempt from legal protection.
BREAKING: The US Marines have detained a US citizen in Los Angeles. This is the first time in known US history that the marines have been used in this way to detain an American without the Insurrection Act being invoked.
The Posse Comitatus Act (1878) Prohibits the use of the U.S. military (Army and Air Force, and by extension Navy and Marines under DoD policy) to enforce domestic laws without explicit Congressional or constitutional authorization.
In other words, Trump is breaking the law once again.